George Sinclair may refer to: George Sinclair (footballer) (1884–1959), Scottish footballer George Sinclair (mercenary) (1580–1612), Scottish mercenary who saw action in Sweden George Sinclair (mathematician) (died 1696), Scottish mathematician Sir George Sinclair (politician) (1912–2005), British Member of Parliament for Dorking Sir George Sinclair, 2nd Baronet (1790–1868), British Member of Parliament for Caithness George Robertson Sinclair (1863–1917), cathedral organist and inspiration of one of Elgar's Enigma Variations George Sinclair (horticulturist) (1787–1834), gardener to the Duke of Bedford George Sinclair, 4th Earl of Caithness (died 1582), Scottish nobleman George Sinclair, 5th Earl of Caithness (died 1643), Scottish nobleman George Sinclair, 6th Earl of Caithness (died 1676), Scottish nobleman George Sinclair, 7th Earl of Caithness (died 1698), Scottish nobleman George Sinclair, 15th Earl of Caithness (1858–1889), Scottish aristocrat George Sinclair, the name of several Earls of Caithness George Brian Sinclair (1928–2020), British general